Noriko Okamachi was a famous television idol, and the human identity of the phage known as Sailor Ojou.
Noriko tried to ask Yaten out, but he declined, which made her angry. When Noriko brought her spoiled Persian cat to the pet groomer's shop and ran into Yaten there, she accused him of being a homosexual. Luna scratched her in response, which almost started a (literal) cat fight, but just then Chuuko Nezu intervened, posing as a nosy reporter.
When Sailor Iron Mouse revealed herself and attacked, Luna tried in vain to save her, and after her Star Seed was removed Noriko turned into Sailor Ojou. After a brief battle against the Sailor Senshi, Eternal Sailor Moon returned her to human form.